Message ID | 20210419160127.192712-12-vkuznets@redhat.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <kvm-owner@kernel.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7ED7AC433B4 for <kvm@archiver.kernel.org>; Mon, 19 Apr 2021 16:02:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5CEAA61369 for <kvm@archiver.kernel.org>; Mon, 19 Apr 2021 16:02:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242409AbhDSQDJ (ORCPT <rfc822;kvm@archiver.kernel.org>); Mon, 19 Apr 2021 12:03:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:26975 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242152AbhDSQCd (ORCPT <rfc822;kvm@vger.kernel.org>); Mon, 19 Apr 2021 12:02:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618848123; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2RPQnpulbnDBtruNQvpj4Fu5bHC2VqRSK2Th5hPcNLA=; b=X7o+Ke2wg1d6iSVb/5F6YrMUN/YUwx+qU0FLzsjRexj6BebmItopHrBa160NL5t12ZQiho FmkFjUgRqUOikK/q77460Obx+dO/tgB6Epy5zgq39LrKCkeLWmKbsqvKbTee+6nxjgvi+Q /gXi12Pz1qzCydnLTTroY5aqkNoP5cA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-317-xmvgH5x2Pzer4d2eooObgQ-1; Mon, 19 Apr 2021 12:01:59 -0400 X-MC-Unique: xmvgH5x2Pzer4d2eooObgQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5000A801814; Mon, 19 Apr 2021 16:01:58 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.193.113]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9A28460636; Mon, 19 Apr 2021 16:01:56 +0000 (UTC) From: Vitaly Kuznetsov <vkuznets@redhat.com> To: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Siddharth Chandrasekaran <sidcha@amazon.de>, linux-kernel@vger.kernel.org Subject: [PATCH 11/30] KVM: x86: hyper-v: Honor HV_MSR_SYNIC_AVAILABLE privilege bit Date: Mon, 19 Apr 2021 18:01:08 +0200 Message-Id: <20210419160127.192712-12-vkuznets@redhat.com> In-Reply-To: <20210419160127.192712-1-vkuznets@redhat.com> References: <20210419160127.192712-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: <kvm.vger.kernel.org> X-Mailing-List: kvm@vger.kernel.org |
Series |
KVM: x86: hyper-v: Fine-grained access check to Hyper-V hypercalls and MSRs
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diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index be6156a27bd7..17bdf8e8196e 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1219,6 +1219,14 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr) case HV_X64_MSR_REFERENCE_TSC: return hv_vcpu->cpuid_cache.features_eax & HV_MSR_REFERENCE_TSC_AVAILABLE; + case HV_X64_MSR_SCONTROL: + case HV_X64_MSR_SVERSION: + case HV_X64_MSR_SIEFP: + case HV_X64_MSR_SIMP: + case HV_X64_MSR_EOM: + case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15: + return hv_vcpu->cpuid_cache.features_eax & + HV_MSR_SYNIC_AVAILABLE; default: break; }
SynIC MSRs (HV_X64_MSR_SCONTROL, HV_X64_MSR_SVERSION, HV_X64_MSR_SIEFP, HV_X64_MSR_SIMP, HV_X64_MSR_EOM, HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15) are only available to guest when HV_MSR_SYNIC_AVAILABLE bit is exposed. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- arch/x86/kvm/hyperv.c | 8 ++++++++ 1 file changed, 8 insertions(+)